core

## Creating Measured Feature Sets

You can measure a single point multiple times as a measured feature set (also called a Point Set). The Insert | Feature | Measured | Feature Set menu item inserts a FEAT/SET command into the Edit window. This measured feature command creates a scan of a single point that measures the same point a defined number of times in order to obtain an averaged (and hopefully more accurate) representation of the point measurement.

Point Sets are most often used as inputs when performing Leapfrog alignment operations with a manual arm machine. See "Performing a Leapfrog Operation" in the "Creating and Using Alignments" chapter for more information.

In Command mode, the Measured Feature Set looks like this:

SCN1=FEAT/SET,RECT

THEO/0,0,0,0,0,1

ACTL/0,0,0,0,0,1

MEAS/SET,0

ENDMEAS/

You can press F9 while your cursor is in his command to display the Measured Set dialog box to edit this command:

Measured Set dialog box

For information on this dialog box, see the "Editing a Measured Feature" topic. The Measured Feature dialog box in that topic contains many of the same items.

To Create a Measured Feature Set (Point Set):

1. Select Insert | Feature | Measured | Feature Set to insert a measured feature set command.

2. Press F9 on the inserted measure feature set command.

3. In the dialog box, in the Feature Theoreticals area, type in the point's theoretical XYZ location and IJK vector.

4. In the Number of Hits box, specify the number of measurements you want PC-DMIS to take on this point. The higher the number, the better average you will receive.

5. Select other options in the dialog box as desired.

6. Click OK. PC-DMIS updates the command in the Edit window.

For example, a finished point set scan with 5 iterations might look like this:

SCN1=FEAT/SET,RECT

THEO/107,11,21,0,0,1

ACTL/0,0,0,0,0,1

MEAS/SET,5

HIT/BASIC,NORMAL,107,11,21,0,0,1,0,0,0,USE THEO = YES

HIT/BASIC,NORMAL,107,11,21,0,0,1,0,0,0,USE THEO = YES

HIT/BASIC,NORMAL,107,11,21,0,0,1,0,0,0,USE THEO = YES

HIT/BASIC,NORMAL,107,11,21,0,0,1,0,0,0,USE THEO = YES

HIT/BASIC,NORMAL,107,11,21,0,0,1,0,0,0,USE THEO = YES

ENDMEAS/